Terminal Unit Controller

Property	Type	Description
Alarm Event Class	Numeric	An index into the event action table. The event action table contains both a set of instructions for alarm routing, and a list of referencer objects (the potential receivers).
Auxiliary Board Present	Binary	This property indicates whether the Terminal Unit Controller has any auxiliary boards installed. 0=ABSENT (not installed), 1=PRESENT (installed).
Auxiliary Temperature	Numeric	This property indicates the active temperature of the mixed air. Mixed air is a combination of outdoor air and return air. Valid Range = -40 to 158 degrees F.
Capacity: Compressor	Numeric	This property indicates the total output, expressed as a percent of capacity, being generated by the compressor(s) if the unit is equipped with a compressor(s). This output is expressed as an analog value between 0 and 100%.
Capacity: Electric Heat	Numeric	This property indicates the total output, expressed as a percent of capacity, being generated using electric heat if the unit is equipped with electric heat. This output is expressed as an analog value between 0 and 100%.
Capacity: Hydronic Cooling	Numeric	This property indicates the total output, expressed as a percent of capacity, being generated using hydronic cooling if the unit is equipped with hydronic cooling capability. The output is loosely measured by monitoring the position of the valve supplying water to the coil. This output is expressed as an analog value between 0 and 100%,
Capacity: Hydronic Heating	Numeric	This property indicates the total output, expressed as a percent of capacity, being generated using hydronic heating if the unit is equipped with hydronic heating capability. The output is loosely measured by monitoring the position of the valve supplying water to the coil. This output is expressed as an analog value between 0 and 100%,
CO2 Status	Numeric	This property indicates the active value of the analog input 4 on the VEM board. The value relates the 0-10 VDC input to a 0-2000 ppm range of CO2.
Communication Address	Numeric	This property provides access to the assigned communications address value of the UCM being represented.
Communication Bad Message Count	Numeric	This is a property for keeping track of the number of message errors which occur when attempting to communicate with the UCM hardware.
Communication Channel	Numeric	This property provides access to the assigned communications channel value of the UCM being represented.
Communication Error Count	Numeric	This is a property for keeping track of the number of communications errors that occur when attempting to communicate with the UCM hardware.
Communication No Answer Count	Numeric	This is a property for keeping track of the number of unanswered communications with the UCM hardware.
Communication Retry	Binary	Provides access to the communications retry indicator. This property is used to signal the control server that it needs to force control data output to the device when it is awakened for maintenance operations. The communications retry indicator is set (TRUE) when an attempt to send control data fails, and cleared (FALSE) when communications are successful.
Communication State	Binary	This property indicates the status of communications between the BCU and the UCM. 0=Down, 1=Up.
Comp: Number of	Numeric	This property indicates the total number of compressor present in the unit. 0=NO COMPRESSORS, 1=ONE COMPRESSOR, 2=TWO COMPRESSORS, 3=THREE COMPRESSORS.
Compressor Disable: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM to enable or disable the compressor(s).
Compressor Disable: Tracer	Binary	This property indicates the value that will be communicated by the system to the UCM and used to disable the compressor. 0=DISABLE COMPRESSOR, 1=AUTO.
Compressor Operation Disabled	Binary	A binary input can be hard-wired on the TUC and used to disable compressor operation. This property indicates the active status of that binary input. 0=NO, 1=YES.
Compressor Status[1–3]	Binary	This property indicates the active status of the compressor (if installed) (Array of 3). 0=OFF, 1=ON.
Conf: Auto Changeover	Binary	This property indicates whether auto changeover has been enabled. Changeover generally applies to two-pipe units that heat and cool based on the temperature of the water running through the coil. Auto changeover may also be used on four-pipe units where the primary coil may be used for both heating and cooling. This property applies to fan coils, unit ventilators, and (potentially) blower coil air handlers. This is a scanned configuration property. 0=DISABLED, 1=ENABLED.
Conf: Aux BIP 1	Binary	This property indicates the configured state of the first binary input on the auxiliary board. Possible states are: (for fan coil, unit vent, or blower coil) 0=OCCUPANT CALL INPUT, 1=IAQ STAT; (for water source heat pump) only configuration is: COMPRESSOR DISABLE INPUT. Default=0. This is a scanned configuration property.
Conf: Aux BIP 2	Binary	This property indicates the configured state of the second binary input on the auxiliary board. Possible states are: (for fan coil, unit vent, or blower coil) 0=OCCUPPIED/UNOCCUPIED, 1=CONDENSATE OVERFLOW; (for water source heat pump) both states are configured for: RETURN AIR TEMP HIGH LIMIT. This is a scanned configuration property.
Conf: Aux BIP 3	Binary	This property indicates the configured state of the third binary input on the auxiliary board. Possible states are: (for fan coil, unit vent, or blower coil) 0=SMOKE INPUT, 1=FREEZE STAT; (for water source heat pump) 0=SMOKE INPUT, 1=FREEZE STAT. This is a scanned configuration property.
Conf: Aux BIP 4	Binary	This property indicates the configured state of the fourth binary input on the auxiliary board. Possible states are: (for fan coil, unit vent, or blower coil) 0=EXTERNAL INTERLOCK, 1=FAN STATUS; (for water source heat pump) 0=EXTERNAL INTERLOCK, 1=FAN STATUS. This is a scanned configuration property.
Conf: Aux BIP 5	Binary	This property indicates the configured state of the fifth binary input on the auxiliary board. Possible states are: (for fan coil, unit vent, or blower coil) 0=MOTION DETECTOR, 1=DIRTY FILTER INPUT; (for water source heat pump) 0=MOTION DETECTOR, 1=DIRTY FILTER INPUT. This is a scanned configuration property.
Conf: Auxiliary Output	Multi-State	This property indicates the active status of the one configurable binary output on the auxiliary board. This binary output can be configured for the following functions: 0=GENERIC AUXILIARY OUTPUT (generally used if Summit will drive this output), 1=EXHAUST FAN, 2=ALARM AUXILIARY OUTPUT (energized when there is an alarm from the TUC), 3=WATER SIDE ECONOMIZER VALVE (not implemented for Version 3). This is a scanned configuration property. NOTE: Regardless of the configuration chosen there is a way, depending on how many stages of electric heat are present on the main board of the TUC, to configure this output for electric heat. If there are not enough outputs on the main board, this output can be used in conjunction with the main board outputs to wire in electric heat output thereby overriding the chosen configuration.
Conf: BIP 1	Binary	This property indicates the configuration of the first binary input on the main TUC board. 0=FAN STATUS, 1=EXTERNAL INTERLOCK. If the TUC controls a water source heat pump, HPC #1 is the only selection (High Pressure Cutout on Circuit 1).
Conf: BIP 1 Normal State	Binary	This property indicates whether this input is normally open or normally closed. 0=NORMALLY CLOSED, 1=NORMALLY OPEN. Default=1.
Conf: BIP 2	Binary	This property indicates the configuration of the second binary input on the main TUC board. 0=DIRTY FILTER, 1=MOTION DETECTOR. If the TUC controls a water source heat pump, 0=DIRTY FILTER, 1=OCCUPIED/UNOCCUPIED.
Conf: BIP 2 Normal State	Binary	This property indicates whether this input is normally open or normally closed. 0=NORMALLY CLOSED, 1=NORMALLY OPEN.
Conf: BIP 3	Binary	This property indicates the configuration of the third binary input on the main TUC board. 0=CONDENSATE OVERFLOW, 1=OCCUPIED/UNOCCUPIED. If the TUC controls a water source heat pump, 0=CONDENSATE OVERFLOW, 1=OCCUPIED/UNOCCUPIED.
Conf: BIP 3 Normal State	Binary	This property indicates whether this input is normally open or normally closed. 0=NORMALLY CLOSED, 1=NORMALLY OPEN.
Conf: BIP 4	Binary	This property indicates the configuration of the fourth binary input on the main TUC board. 0=FREE STAT, 1=SMOKE INPUT. If the TUC controls a water source heat pump, LPC #1 is the only selection (Low Pressure Cutout on Circuit 1).
Conf: BIP 4 Normal State	Binary	This property indicates whether this input is normally open or normally closed. 0=NORMALLY CLOSED, 1=NORMALLY OPEN.
Conf: Economizer	Multi-State	This property indicates the active configuration of the TUC. 0=NO ECONOMIZER, 1=2-POSITION OUTDOOR AIR DAMPER, 2=MODULATING ANALOG ECONOMIZER, 4=3-WIRE FLOATING POINT ECONOMIZER.
Conf: Electric Heat Control Seq	Binary	This property indicates how the electric heating in the unit is being used; as a primary source of heating or as a supplemental source. 0=PRIMARY ELECTRIC HEAT, 1=SUPPLEMENTAL ELECTRIC HEAT.
Conf: Electric Heat Stages (Cnt)	Multi-State	This property indicates the total number of electric heat outputs installed on the unit. 0=NO OUTPUTS, 1=ONE OUTPUT, 2=TWO OUTPUTS, 3=THREE OUTPUTS.
Conf: Electric Heat Staging	Binary	This property allows the operator to choose between two electric heat algorithms. If there are two equally sized electric heat stages, then the unit should be configured as sequential. If there are two different sizes of electric heat stages (i.e., 2/3 vs. 1/3), then the unit should be configured as progressive. 0=SEQUENTIAL, 1=PROGRESSIVE.
Conf: Face and Bypass	Multi-State	This property indicates which face and bypass damper configuration the TUC uses. 0=NO FACE AND BYPASS DAMPER, 1=MODULATING ANALOG FACE AND BYPASS DAMPER, 2=3-WIRE FLOATING POINT FACE AND BYPASS DAMPER.
Conf: Humidity Control	Binary	This property is configurable and indicates to the unit whether it should be able to dehumidify. 0=DISABLE, 1=ENABLE,
Conf: Main Board Exhaust	Binary	This property indicates whether an output has been installed on the main board which will be used to control an exhaust fan. 0=NOT INSTALLED ON MAIN BOARD, 1=INSTALLED ON MAIN BOARD.
Conf: Occupied Fan Operation	Binary	This property indicates whether the fan runs continuously while occupied or cycles ON and OFF based on capacity demand. 0=RUN FAN CONTINUOUSLY, 1=CYCLING.
Conf: Purge Mode Control	Binary	This property indicates the active status of the hydronic purge function if the TUC unit is configured with that capability. 0=ENABLED, 1=DISABLED.
Conf: Random Start	Binary	This property indicates whether a unit is set to start randomly after a power loss. If enabled, the unit will start anywhere from 3 to 30 seconds after power has been returned. 0=NO RANDOM START, 1=RANDOM START.
Conf: Supply Fan Control Source	Binary	This property indicates what controls the fan when the TUC is in the occupied mode. 0=LOCAL (zone sensor), 1=REMOTE (BCU controls).
Conf: Supply Fan Speed	Multi-State	This property indicates the number of fan speeds configured for the TUC unit. 0=ONE SPEED, 1=TWO SPEED, 2=THREE SPEED.
Conf: Supply Fan Speed Range	Binary	This property indicates the total capacity that can be obtained from the fan. 40 to 100% is currently the only option.
Conf: Supply Fan Voltage	Binary	This property indicates 0 = 0 to 10 volts (fan OFF at 0 volts; fan ON at 100% at 10 volts), 1 = 2 to 10 volts/4 to 20 mA (fan OFF at 2 volts; fan ON at 100% at 10 volts).
Conf: Unit Configuration	Multi-State	This property indicates the specific configuration of the TUC unit. The possible configurations are: 1=2-Pipe heat or cool valve, 2=4-Pipe heat and cool valve, 3=2-Pipe heat valve with DX cooling, 4=DX Cooling, 5=2-Pipe face and bypass damper, 6=4-Pipe face and bypass damper, 7=2-Pipe cool valve, 8=Water source heat pump (heat and cool), 9=Face and bypass with DX cooling, 10=2-Pipe heat valve, 11=Water source heat pump (cool only). NOTE: Electric heat and economizer are options on all configurations.
Conf: Unit Type	Multi-State	This property indicates the general category of the TUC unit. Possibilities include: 0=Unknown ("TUC"), 2=Fan Coil ("FAN COIL A"), 3=Waco Unit Ventilator ("UNIT VENT"), 4=WSHP ("WSHP"), 7=Blower Coil AHU ("BCHA").
Conf: Valve #1	Multi-State	This property indicates the active configuration of Valve 1. Possibilities include: 0=NO VALVE, 1=SOLENOID ON/OFF, 4=MODULATING ANALOG VALVE, 8=3-WIRE FLOATING POINT.
Conf: Valve #2	Multi-State	This property indicates the active configuration of Valve 2. Possibilities include: 0=NO VALVE, 1=SOLENOID ON/OFF, 4=MODULATING ANALOG VALVE, 8=3-WIRE FLOATING POINT.
Control Event Class	Numeric	This property identifies the control event class to be used for controlling the given commandable object.
Control Mode	Multi-State	The value of this property emulates the human interface result discussed in EMTX-IOP-1 for the TUC. It is expressed as a decimal value.
Control Offset Cooling: Tracer	Numeric	This property indicates the value that will be communicated by the system to the UCM and used as the cooling control offset.
Control Offset Enable: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM to enable control offset.
Control Offset Heating: Tracer	Numeric	This property indicates the value that will be communicated by the system to the UCM and used as the heating control offset.
Control Offset Value: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM as the control offset value for both heating and cooling.
Cooling Setpoint: Active	Numeric	This property indicates the actual cooling setpoint that the unit is presently using. Valid entries are 40.0 to 110.0 degrees F.
Cooling Setpoint: Local	Numeric	This property indicates the setting of the adjustable knob or slide bar located at the local zone sensor. Valid entries are 50.0 to 90.0 degrees F.
Dehumidific. Start Stpnt: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communication to the UCM to start dehumidification.
Dehumidific. Start Stpnt: Trcr	Numeric	This property indicates the value that is communicated by the system to the UCM and used to start dehumidification control. Valid Range: 20 to 100 F.
Dehumidific. Stop Stpnt: Ref	Property Referencer	This property indicates the value to be used by the BCU to determine which value to communication to the UCM to stop dehumidification.
Dehumidific. Stop Stpnt: Trcr	Numeric	This property indicates the value that is communicated by the system to the UCM and used to stop dehumidification control. Valid Range: 0 to 50 F.
Dehumidification Control: Ref	Property Referenc	This property indicates the value to be used by the BCU to determine which value to communication to the UCM as the dehumidification control. 0=Disabled, 1=Enabled.
Dehumidification Control: Tracer	Binary	This property indicates the active status of dehumidification control. Valid range: 1=Enabled, 0=Disabled.
Dehumidification Start % Active	Numeric	This property indicates the value that the unit uses as the percentage of relative humidity (measuring the return air) which will be allowable before the unit starts dehumidifying. Not supported in Version 3.
Dehumidification Stop % Active	Numeric	This property indicates the value that the unit uses as the percentage of relative humidity (measuring the return air) which will be acceptable before the unit stops dehumidifying. Not supported in Version 3.
Dehumidifying	Binary	This property indicates the active status of the dehumidifying mode on the unit. 0=NO, 1=YES
Diag: CO2 Fail	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when an a Carbon Dioxide sensor wired to the VEM board in the TUC fails to respond to the system. 0=NORMAL (or never existed), 1=FAIL (no longer responding).
Diag: Comp Freezestat[1–3]	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when the temperature of the water leaving the compressor on a water source heat pump has fallen below an adjustable value (configured in the unit) and, consequently, the unit has been shut down. This is a latching diagnostic that requires a manual reset (Array of 3). 0=NORMAL, 1=FAIL (diagnostic is present).
Diag: Comp HPC[1–3]	Binary	This property indicates the active status of this diagnostic (HPC means "high pressure cutout"). This diagnostic is present when the refrigerant pressure (measured at the compressor) has exceeded a defined value and, consequently, the unit has been shut down. This is a latching diagnostic that requires a manual reset (Array of 3). 0=NORMAL, 1=FAIL (diagnostic is present).
Diag: Comp Locked out[1–3]	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when compressor #1 has been locked out because a latching diagnostic has occurred or because Tracer Summit has controlled the compressor to a disabled mode (Array of 3). 0=NORMAL, 1=FAIL (diagnostic is present).
Diag: Comp LPC[1–3]	Binary	This property indicates the active status of this diagnostic (LPC means "low pressure cutout"). This diagnostic is present when the refrigerant pressure (measured at the compressor) is below a defined value and, consequently, the unit has been shut down. This is a latching diagnostic that requires a manual reset (Array of 3). 0=NORMAL, 1=FAIL (diagnostic is present).
Diag: Comp LWT Sensor[1–3]	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when the sensor monitoring the leaving water temperature on the circuit of the water source heat pump has failed (Array of 3). 0=NORMAL, 1=FAIL (diagnostic is present).
Diag: Condensate Overflow	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when the level of water in the condensate pan (collects the water that condenses on the coil and drips off) gets too high and a float activates a switch to shut down the unit. 0=NORMAL, 1=FAIL (diagnostic is present). This is a latching diagnostic that requires manual reset.
Diag: Control Request	Binary	This property indicates the active status of this diagnostic. The diagnostic is present when the TUC is powered up and waiting for control information to be sent from the BCU. When control information is received from the BCU, this diagnostic disappears. 0=NORMAL (control information has been received), 1=FAIL (diagnostic is present).
Diag: Cooling Setpoint Fail	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when the TUC can no longer read the cooling setpoint from a zone sensor that had previously been installed. 0=NORMAL (still reading setpoint or never existed), 1=FAIL (did exist at one point and is now not available).
Diag: Defrost Request	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when the outdoor coil temperature gets too low. Used as a corrective action to prevent the coil from freezing (applicable to compressors or unit ventilators with DX capability only). 0=NO, 1=YES
Diag: Dirty Filter	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when the pressure on one side of the filter becomes greater than the pressure on the opposite side of the filter as measured by a differential pressure switch. This pressure change indicates a dirty filter and the diagnostic is activated. This is a non-latching diagnostic used for status only. 0=NORMAL, 1=DIRTY FILTER (diagnostic is present).
Diag: EEPROM Failure	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when a catastrophic failure of the main board in the TUC has occurred. This diagnostic indicates that the main board should be replaced. 0=NORMAL, 1=FAIL (diagnostic present).
Diag: EWT Sensor Fail	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when the sensor monitoring the unit’s entering water temperature no longer provides data. 0=NORMAL (or never existed), 1=FAIL (diagnostic exists).
Diag: EWT Too High	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when the sensor monitoring the temperature of the water entering a unit rises above an adjustable configured level. 0=NORMAL, 1=FAILED (limit has been exceeded).
Diag: EWT Too Low	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when the sensor monitoring the temperature of the water entering a unit falls below an adjustable configured level. 0=NORMAL, 1=FAILED (limit has been exceeded).
Diag: Freezestat	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when a mechanical device monitoring the air/water temperature wired to the TUC as a binary input indicates that the temperature is too cold. 0=NORMAL, 1=FAILED (too cold). This is a latching diagnostic that requires manual reset.
Diag: Generic Analog Input Fail	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when a generic analog input wired to the VEM board in the TUC fails to respond to the system. 0=NORMAL (or never existed), 1=FAIL (no longer responding).
Diag: Heat Setpoint Fail	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when the sensor is the heating setpoint and it is no longer responding. 0=NORMAL (or never existed), 1=FAILED (after existing).
Diag: Low Air Flow	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when the pressure on one side of the fan becomes greater than the pressure on the opposite side of the fan as measured by a differential pressure switch. A pressure similarity indicates that the fan is not operating and the diagnostic is activated. This diagnostic can be either latching or non-latching diagnostic. 0=NORMAL, 1=FAILED (diagnostic is present).
Diag: Manual Reset Required	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when a latching diagnostic is in effect and manual reset is required. 0=NORMAL, 1=FAIL (diagnostic is present).
Diag: MAT Sensor Fail	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when the mixed air temperature sensor (mixed air is defined as a combination of return air from the room and outside air) fails to respond to the system. 0=NORMAL (or never existed), 1=FAIL (no longer responding).
Diag: Non-latching Present	Binary	This property indicates the presence of any non-latching diagnostic active on the TUC. 0=NO NON-LATCHING DIAGNOSTIC PRESENT, 1=NON-LATCHING DIAGNOSTIC PRESENT.
Diag: OA Temp Sensor Fail	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when an Outside Air Temperature sensor, wired as an input to the main board in the TUC, no longer responds to the system. 0=NORMAL (or never existed), 1=FAIL (no longer responding).
Diag: RA Rel Humid Fail	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when a Return Air Relative Humidity sensor, wired as an input to the economizer quality board in the TUC, no longer responds to the system. 0=NORMAL (or never existed), 1=FAIL (no longer responding).
Diag: RA Temp High Limit	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when the temperature being monitored for the Return Air exceeds a configured adjustable high limit. 0=NORMAL, 1=FAIL (high limit exists).
Diag: RA Temp Sensor Fail	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when the Return Air Temperature sensor no longer responds to the system. 0=NORMAL (or never existed), 1=FAIL (no longer responding).
Diag: SA Temp High Limit	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when the temperature being monitored for the Supply Air exceeds a configured adjustable high limit. 0=NORMAL, 1=FAIL (high limit exists).
Diag: SA Temp Low Limit	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when the temperature being monitored for the Supply Air exceeds a configured adjustable low limit. 0=NORMAL, 1=FAIL (low limit exists).
Diag: SA Temp Sensor Fail	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when the Supply Air Temperature sensor no longer responds to the system. 0=NORMAL (or never existed), 1=FAIL (no longer responding).
Diag: SCUV Compressor Cutout	Binary	This property indicates the active status of BIP#1 of the TUC for SCUV (series connection of a high pressure switch and a low pressure switch). 0=Normal, 1=Failed
Diag: Smoke Status Alarm	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when a sensor wired as a binary input on the main TUC board (configurable for smoke input) indicates that smoke is present. 0=NORMAL, 1=SMOKE STATUS ALARM STATE EXISTS.
Diag: UCM Bad Config	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when a board on the TUC has been configured improperly. Consult with the factory if this diagnostic exists. 0=NORMAL, 1=BAD.
Diag: VOC Fail	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when an VOC sensor wired to the Ventilation Effectiveness Module (VEM) board in the TUC fails to respond to the system. 0=NORMAL (or never existed), 1=FAIL (no longer responding).
Diag: Zone Temp Away Setpts	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when the zone temperature sensor value is ten degrees or more less than the heating setpoint. This diagnostic is for status only. 0=NO (temp is within limits), 1=YES (temp is outside limits).
Diag: Zone Temp Sensor Fail	Binary	This property indicates the active status of this diagnostic. This diagnostic is present when the Zone Temperature sensor no longer responds to the system. 0=NORMAL (or never existed), 1=FAIL (no longer responding).
Diagnostic Code	Multi-State	00 = None 01 = External Interlock 48 = Low DAT 77 = DX Defrost Mode 7D = Compressor Disabled by Master 7E = Compressor Disabled by Local Binary Input 7F = Compressor Disabled by Tracer 8B = Condensate Overflow 9B = Bad Leaving Water Sensor #1 9C = Bad Leaving Water Sensor #2 9D = Bad Leaving Water Sensor #3 A0 = Bad Zone Sensor/DAT Sensor A1 = Electric Heat Disabled by No Fan B5 = Low Pressure Cutout #1 B6 = Low Pressure Cutout #2 B7 = Low Pressure Cutout #3 B8 = SCUV Compressor Failed C6 = Low Lvg. Water #2 C7 = Low Lvg. Water #3 C8 = Compressor Cooling Lockout (High EWT) C9 = Low vg. Water #1 CA = Slave SD by Master LD CB = Compressor Heating Lockout (Low EWT) CE = Fan Failure CF = Freeze D3 = Low Discharge Air Temp D4 = Smoke D5 = High Discharge Air Temp DD = Compressor Cooling LO by low OAT DE = Compressor Heating LO by high OAT EF = EEPROM failure F5 = High Pressure Cutout #1 F6 = High Pressure Cutout #2 F7 = High Pressure Cutout #3 F8 = Bad Configuration FE = High Return Air Temperature
Economizer Control: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM as the economizer control.
Economizer Control: Tracer	Multi-State	This property indicates the value that will be communicated by the system to the UCM and used enable and disable the economizer control. 0=AUTO, 1=ENABLE, 2=DISABLE.
Economizer Min Position: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM as the outside air damper minimum position.
Economizer Min Position: Tracer	Numeric	This property indicates the value that will be communicated by the system to the UCM and used as the minimum position of the outdoor air damper. Valid Range = 0 to 100%.
Electric Heat 1 Status	Binary	It is possible to have up to three stages of electric heat installed on the TUC unit. This property indicates the active status of the Stage 1 electric heat source. 0=OFF, 1=ON.
Electric Heat 2 Status	Binary	It is possible to have up to three stages of electric heat installed on the TUC unit. This property indicates the active status of the Stage 2 electric heat source. 0=OFF, 1=ON.
Electric Heat 3 Status	Binary	It is possible to have up to three stages of electric heat installed on the TUC unit. This property indicates the active status of the Stage 3 electric heat source. 0=OFF, 1=ON.
Electric Heat Control: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM as the electric heat control.
Electric Heat Control: Tracer	Binary	This property indicates the value that will be communicated by the system to the UCM and used as the electric heat control. 0=AUTO, 1=DISABLE.
Energy Recovery System Output	Binary	This property reads the active state of the ERS output on the AUX board. This output is expressed as either DISABLED or ENABLED.
Entering Water Temperature	Numeric	This property indicates the value being returned by the entering water temperature sensor. Range = -20 F to 215 F. Resolution = 0.1.
Entering Water Temperature: Ref (Name obsoleted in v14)	Property Reference	See 'Source Temperature: Ref'
Entering Water Temperature: Tracer (Name obsoleted in v14)	Numeric	See 'Source Temperature: Tracer'
Exhaust Control: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM as the exhaust control.
Exhaust Control: Tracer	Binary	This property indicates the value that will be communicated by the system to the UCM and used as the exhaust control. 0=DISABLE, 1=AUTO.
Exhaust Off: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM to control the exhaust fan to OFF.
Exhaust Off: Tracer	Binary	This property indicates the value that will be communicated by the system to the UCM and used to control the exhaust fan OFF. 0=AUTO, 1=OFF.
Exhaust On: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM to control the exhaust fan to ON.
Exhaust On: Tracer	Binary	This property indicates the value that will be communicated by the system to the UCM and used to control the exhaust fan ON. 0=AUTO, 1=ON.
Exhaust Status	Binary	This property indicates active status of the binary output controlling the exhaust fan. 0=OFF, 1=ON.
External Interlock Input	Binary	This property is used to enable and disable the unit through the use of a binary input. This binary input must be configured for this function. 0=OK TO RUN, 1=STOP.
Face and Bypass Damper Position	Numeric	This property indicates the active position of the face and bypass damper. Valid Range = 0 to 100%.
Generic Analog Input Status	Numeric	This property indicates active value of the only analog input on the auxiliary board. Valid Range = 0 to 100%.
Generic Auxiliary Output: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM as the auxiliary board’s generic binary output.
Generic Auxiliary Output: Tracer	Binary	This property indicates the value that will be communicated by the system to the UCM and used as the auxiliary board’s generic binary output.
Heat/Cool Control: Active	Binary	This property indicates whether the TUC unit is making its own changeover decision (to heat or cool) or whether that decision comes from the BCU. 0=AUTO (decision is made locally), 1=MANUAL (Tracer controls).
Heat/Cool Control: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM for heat/cool control.
Heat/Cool Control: Tracer	Binary	This property indicates the value that will be communicated by the system to the UCM and used as the heat/cool control. 0=AUTO, 1=MANUAL.
Heat/Cool Mode: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM as the heat/cool mode.
Heat/Cool Mode: Tracer	Binary	This property indicates the value that will be communicated by the system to the UCM and used as the heat/cool mode. 0=HEAT, 1=COOL.
Heating or Cooling Requested	Binary	This property indicates whether the TUC unit currently has a heating or cooling capacity greater than 0%. 0=NO, 1=YES (heating/cooling capacity is greater than 0%).
Heating Setpoint: Active	Numeric	This property indicates the actual heating setpoint that the unit is presently using. Valid entries are 40.0 to 110.0 degrees F. NOTE: Many of the zone sensors do not have a heating setpoint thumbwheel; therefore, if the heating setpoint is not gotten from the BCU, it is calculated by applying an offset to the Cooling Setpoint: Active value.
Heating Setpoint: Local	Numeric	This property indicates the value of the heating setpoint thumbwheel located at the zone sensor. Valid entries are 50.0 to 90.0 degrees F.
I/O Expansion Board	Binary	This property indicates whether an input/output expansion board has been installed in the TUC unit. 0=ABSENT, 1=INSTALLED.
ICS Control: Local	Binary	This property indicates whether the BCU is sending control information to the UCM. 0=NO, 1=YES (BCU is sending control information).
ICS Control: Referencer	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM as the ICS control.
ICS Control: Tracer	Binary	This property indicates the value that will be communicated by the system to the UCM and used for ICS control 0=NO (Local), 1=YES (ICS).
Indoor Air Quality Input Status	Binary	This property indicates the active state of a binary input on the economizer quality board wired to an indoor air quality sensor. 0=GOOD AIR, 1=BAD AIR.
Last Control Date Time	Date/Time Numeric	This indicates the date and time when the present value property of this object was last controlled.
Leaving Water Temperature 1	Numeric	This property indicates the active value being received from the leaving water temperature sensor on circuit 1. Valid Range = -20 to 215 degrees F.
Leaving Water Temperature 2	Numeric	This property indicates the active value being received from the leaving water temperature sensor on circuit 2. Valid Range = -20 to 215 degrees F.
Leaving Water Temperature 3	Numeric	This property indicates the active value being received from the leaving water temperature sensor on circuit 3. Valid Range = -20 to 215 degrees F.
Machine State	Multi-State	00=Manufacturing Test 02=Bad Configuration 04=Auto Cycle Test 06=Disable 08=Stop 0A=Calibration 0C=Latching Diagnostic 0E=Freeze Shutdown 10=Soft Reset 12=Standby 14=Cooling 16=Heating
Max Mech Cooling Enable: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM to enable maximum mechanical cooling.
Max Mech Cooling Limit: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM as the maximum mechanical cooling limit.
Max Mech Cooling Limit: Tracer	Numeric	This property indicates the value that will be communicated by the system to the UCM and used as the maximum mechanical cooling limit.
Max Mech Heating Enable: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM to enable maximum mechanical heating.
Max Mech Heating Limit: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM as the maximum mechanical heating limit.
Max Mech Heating Limit: Tracer	Numeric	This property indicates the value that will be communicated by the system to the UCM and used as the maximum mechanical heating limit.
Minimum Off Time	Numeric	This property provides access to the minimum off time assigned to the UCM being represented. This value serves to protect the hardware from cycle times which might harm the hardware.
Minimum On Time	Numeric	This property provides access to the minimum on time assigned to the UCM being represented. This value serves to protect the hardware from cycle times which might harm the hardware.
Minimum Time Remaining	Numeric	This property provides access to the minimum time remaining (if any) of a minimum On/Off time control action for the represented UCM device. PUTS are also allowed so that an operator can intervene on a Minimum On/Off control action that is in progress.
Motion Detector: Local	Binary	This property indicates the active status of the binary input (from a motion detector) wired to either the main or auxiliary board of the TUC (depending on configuration). 0=NO MOTION, 1=MOTION HAS BEEN DETECTED.
Object Identifier	Object ID	This property allows the assignment of a unique printable name to the object for user identification.
Object Type	Multi-State	This property Designates the object’s type (i.e., analog input, binary input, TCM, PCM, etc.).
Occ/Unocc: External	Binary	This property indicates the active status of a binary input wired to either the main or auxiliary board in the TUC (depending on configuration). 0=UNOCCUPIED, 1=OCCUPIED. NOTE: This property is generally used to switch the TUC from Occupied to Unoccupied using an external time clock if the TUC were not connected to a BCU.
Occupancy Detection: Ref	Numeric	This value represents the value to be used by the BCU to determine the value to communicate to the TUC to enable or disable the occupancy detection function.
Occupancy Detection: Tracer	Numeric	This property indicates the value that will be communicated by the system to the TUC and used to enable or disable the occupancy detection feature.
Occupancy: Local	Binary	This property indicates the value that will be communicated by the UCM to the system and used to determine occupancy. 0=UNOCCUPIED, 1=OCCUPIED.
Occupancy: Tracer	Binary	This property indicates the value that will be communicated by the system to the UCM and used to determine occupancy. 0=UNOCCUPIED, 1=OCCUPIED.
Occupant Call: Local	Binary	This property indicates the active status of a binary input wired to the main or auxiliary board (depending on configuration) that when in the ON state identifies an occupant requiring attention. 0=NO CALL, 1=OCCUPANT CALL.
Occupied Cool Setpoint: Tracer	Property Reference	This property indicates the value that will be communicated by the system to the UCM and used as the occupied cooling setpoint. Valid Range = 40 to 110 degrees F.
Occupied Cool Stpt: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM as the occupied cooling setpoint.
Occupied Heat Setpoint: Tracer	Numeric	This property indicates the value that will be communicated by the system to the UCM and used as the occupied heating setpoint. Valid Range = 40 to 110 degrees F. NOTE: This setpoint must be the same or less than the occupied cooling setpoint.
Occupied Heat Stpt: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM as the occupied heating setpoint.
Outdoor Air Damper Closed: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM to drive closed the outdoor air damper.
Outdoor Air Damper Closed: Tracr	Binary	This property indicates the value that will be communicated by the system to the UCM and used to drive the outdoor air damper closed. 0=AUTO, 1=CLOSED.
Outdoor Air Damper Open: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM to drive open the outdoor air damper.
Outdoor Air Damper Open: Tracer	Binary	This property indicates the value that will be communicated by the system to the UCM and used to drive the outdoor air damper open. 0=AUTO, 1=OPEN.
Outdoor Air Damper Position	Numeric	This property indicates the active position of the outdoor air damper (if the unit is configured for one). If the outdoor air damper is a modulating air damper, the valid range is between 0 and 100%. If it is a 2-position outdoor air damper, the value that appears will be either 0 or 100% (closed or open).
Outdoor Air Temperature: Active	Numeric	This property indicates the value that the TUC is actively using as its outdoor air temperature. Valid Range = -40 to 158 degrees F.
Outdoor Air Temperature: Input	Numeric	This property indicates the value that the outdoor air temperature sensor wired to the TUC is currently measuring. Valid Range = -40 to 158 degrees F.
Outdoor Air Temperature: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM as the Outdoor Air Temperature.
Outdoor Air Temperature: Tracer	Numeric	This property indicates the value that will be communicated by the system to the UCM and used as the Outdoor Air Temperature. Valid Range = -40 to 158 degrees F.
Present Value	Op Mode	This property is used to control the unit to one of nine standard operation modes. These modes are defined as UNOCCUPIED, OPTIMAL START, OCCUPIED, OPTIMAL STOP, DEMAND LIMIT, DUTY CYCLE, PRIORITY SHUTDOWN, NIGHT ECONOMIZE, and NIGHT HEAT-COOL. A translation (within the BCU) may take place to map these modes into a simpler mode set.
Purge Indicator	Binary	This property indicates whether the TUC unit is actively purging. 0=NO, 1=YES.
Reheat Heating Capacity	Numeric	This property indicates the calculated output capacity used for controlling any defined reheat source when using the dehumidification function. This output is expressed as an analog value between 0 and 100%.
Reset Compressor Lockout: Tracer	Binary	This property indicates the value that will be communicated by the system to the UCM and used to reset the compressor when locked out. 0=NO, 1=YES.
Reset Diagnostics: Ref	ObjectConst	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM to reset diagnostics.
Reset Latching Diags: Tracer	Binary	This property indicates the value that will be communicated by the system to the UCM and used to reset a latching diagnostic. 0=NO, 1=YES.
Return Air Relative Humidity	Numeric	This property indicates the value returned from a return air relative humidity sensor wired to the economizer quality board in the TUC unit. Valid Range = 0 to 100%.
Return Air Temperature	Numeric	This property indicates the value returned from a return air temperature sensor wired to the main board in the TUC unit. Valid range = -40 to 158° F.
Reversing Valve	Binary	This property indicates the active status of the reversing valve (applies to Water Source Heat Pumps only). 0=OFF/HEAT, 1=ON/COOL.
SA Temperature	Numeric	This property indicates value returned from the supply air temperature sensor (wired to the main board) measuring the temperature of the supply air leaving the TUC unit. Valid Range = -20 to 215 degrees F.
Setpoint Source: Active	Multi-State	This property indicates the active source from which the TUC is receiving its heating and cooling setpoints. 0=TRACER, 1=LOCAL, 2=DEFAULT (stored in the configuration of the TUC), 3=UNOCCUPIED.
Smoke Detector Input	Binary	This property indicates the active status of a binary input wired to smoke detector.
Source Temperature: Ref (Formerly called 'Entering Water Temperature: Ref')	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM as the entering water temperature.
Source Temperature: Tracer (Formerly called 'Entering Water Temperature: Tracer')	Numeric	This property indicates the value that will be communicated by the system to the UCM and used as the entering water temperature. If the unit has a local sensor, Tracer cannot override the local sensor value.
Supply Air Temp Setpoint	Numeric	This property indicates the value calculated by the TUC using internal algorithms that is used for the supply air temperature setpoint. Valid Range = -40 to 215 degrees F.
Supply Air Temp Setpoint: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM as the supply air temperature setpoint.
Supply Air Temp Setpoint: Tracer	Numeric	This property indicates the value that will be communicated by the system to the UCM and used as the supply air temperature setpoint. Valid Range = -40 to 215 degrees F.
Supply Fan Cntrl Source: Active	Multi-State	This property indicates from where the TUC unit is getting its fan control instructions. 0=TRACER, 1=LOCAL (zone sensor).
Supply Fan Control: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM as the supply fan control.
Supply Fan Control: Tracer	Numeric	This property indicates the value that will be communicated by the system to the UCM and used to control the supply air fan.
Supply Fan Operation	Binary	This property indicates whether the fan runs continuously while occupied or cycles ON and OFF based on capacity demand. 0=RUN FAN CONTINUOUSLY, 1=CYCLING.
Supply Fan Speed: Active	Multi-State	This property indicates the active fan speed at the unit. 0=OFF, 1=LOW, 2=MEDIUM, 3=HIGH, 4=DOES NOT EXIST, 5=ON (single speed fan only).
Supply Fan Switch	Binary	This property indicates whether the zone sensor is equipped with a fan switch. 0=ABSENT, 1=PRESENT.
Supply Fan Switch: Local	Multi-State	This property indicates what position the fan switch is in if a fan switch is installed on the zone sensor. 0=OFF, 1=LOW, 2=MEDIUM, 3=HIGH, 4=AUTO, 5=ON. NOTE: Auto means that the fan speed will vary as required (depending on the number of fan speeds present) based on the capacity of the unit.
System Mode Source: Active	Multi-State	This property indicates the active mode of the system controlling the TUC. Possibilities include: 0=OFF, 1=AUTO, 2=COOL, 3=HEAT, 4=EMERGENCY HEAT.
System Mode Switch Position	Multi-State	This property indicates the active position of the system mode switch (if installed) located on the zone sensor. 0=OFF, 1=AUTO, 2=COOL, 3=HEAT, 4=EMERGENCY HEAT. NOTE: Each of these options may or may not be available depending on the zone sensor being used.
System Mode Switch: Local	Binary	This property indicates whether there is a system mode switch installed on the zone sensor. 0=ABSENT, 1=PRESENT
Timed Override Request	Binary	This property indicates the active status of the Timed Override Flag which is set when the Timed Override button is pushed on the zone sensor. 0=NO (not pressed), 1=YES (pressed).
Timed Override Request: Cancel	Binary	This property indicates the active status of the Cancel Timed Override Flag which is set when the cancel button is pushed on the zone sensor. 0=NO (not pressed), 1=YES (pressed).
UCM Analog Differential	Numeric	This property indicates the number of degrees applied to either setpoint to determine the other setpoint.
UCM Mode	Multi-State	This property indicates the active mode of the TUC unit. Possible modes include: 0=OFF, 1=LATCHING DIAGNOSTIC, 2=STANDBY, 3=COOL, 4=HEAT, 5=EMERGENCY HEAT.
UCM Software Revision	Numeric	This property indicates active revision number for the software being used on the TUC main board.
UCM Use Differential	Binary	This property indicates whether or not to apply the UCM Analog Differential to one setpoint to determine the other setpoint.
Unit Disable: Local	Binary	This property shows the operator if the TUC is enabled or disabled from the Tracer Summit system. 0=ENABLED, 1=DISABLED.
Unit Disable: Tracer	Binary	This property indicates the value that will be communicated by the system to the UCM and used to disable the TUC. 0=ENABLED, 1=DISABLED.
Update Tag	Numeric	Object instance update tag. This tag is used to indicate that the nonvolatile memory resident data within the particular instance has changed. The workstation is the primary user of this property.
Valve #1 Closed: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM to drive valve 1 closed.
Valve #1 Closed: Tracer	Binary	This property indicates the value that will be communicated by the system to the UCM and used to drive valve 1 closed. 0=AUTO, 1=CLOSED.
Valve #1 Open: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM to drive valve 1 open.
Valve #1 Open: Tracer	Binary	This property indicates the value that will be communicated by the system to the UCM and used to drive valve 1 open. 0=AUTO, 1=OPEN.
Valve #1 Position	Numeric	This property indicates the active status of the valve 1 position. Valid Range = 0 to 100%. NOTE: If valve 1 is a 2-position valve the value shown here will be either 0 or 100%.
Valve #2 Closed: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM to drive valve 2 closed.
Valve #2 Closed: Tracer	Binary	This property indicates the value that will be communicated by the system to the UCM and used to drive valve 2 closed. 0=AUTO, 1=CLOSED.
Valve #2 Open: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM to drive valve 2 open.
Valve #2 Open: Tracer	Binary	This property indicates the value that will be communicated by the system to the UCM and used to drive valve 2 open. 0=AUTO, 1=OPEN.
Valve #2 Position	Numeric	This property indicates the active status of the valve 2 position. Valid Range = 0 to 100%. NOTE: If valve 2 is a 2-position valve the value shown here will be either 0 or 100%.
VEM BIP 1 Normal State	Binary	This property indicates the normal states of binary input 1 on the VEM board. 0=NORMALLY CLOSED, 1=NORMALLY OPEN.
VEM BIP 2 Normal State	Binary	This property indicates the normal states of binary input 2 on the VEM board. 0=NORMALLY CLOSED, 1=NORMALLY OPEN.
VEM Board	Binary	This property indicates whether the Ventilation Effectiveness Module (VEM) board is installed on the TUC. 0=NOT PRESENT, 1=INSTALLED.
Ventilation Control: Tracer	Numeric	This property indicates the value that will be communicated by the system to the UCM and used control ventilation. 0=AUTO, 5=STOP
VOC Status	Numeric	This property indicates the active value of the analog input 3 on the VEM board. The value relates the 0-10 VDC input directly.
Zone Temperature: Active	Numeric	This property indicates the value actively being used by the TUC unit as the zone temperature. Valid Range = -40 to 150 degrees F.
Zone Temperature: Local	Numeric	This property indicates the value being returned by the zone temperature sensor wired to the main board of the TUC unit. Valid Range = -40 to 150 degrees F.
Zone Temperature: Ref	Property Reference	This property indicates the value to be used by the BCU to determine which value to communicate to the UCM as the zone temperature.
Zone Temperature: Tracer	Numeric	This property indicates the value that will be communicated by the system to the UCM and used as the zone temperature. Valid Range = -40 to 150 degrees F.